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        <EndYearBalanceAmt>158847</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>55649</BeginningYearBalanceAmt>
        <ContributionsAmt>84523</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>8632</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>2513</GrantsOrScholarshipsAmt>
        <EndYearBalanceAmt>146291</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <PrmnntEndowmentBalanceEOYPct>0.95000</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.05000</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>114874</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>114874</DepreciationAmt>
        <BookValueAmt>0</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED JOURNAL REVENUE</Desc>
        <Amt>45714</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>45714</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>1196189</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>39826</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>39826</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>1156363</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>6086</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>6086</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>1162449</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>1117681</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1117681</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>6086</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>6086</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1123767</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>DURING 2013, THE SOCIETY RECEIVED A $59,000 CONTRIBUTION TO ESTABLISH THE THE FRANK PUTNAM TRAUMA RESEARCH SCHOLARS AWARD ENDOWMENT FUND. THE PERMANENTLY RESTRICTED FUND IS TO BE HELD IN PERPETUITY. EARNINGS ON THE PERMANENTLY RESTRICTED NET ASSETS ARE TO SUPPORT TWO STUDENT AWARDS EACH YEAR. DURING 2019 THE SOCIETY SET UP THE GLOBAL TRAVEL AWARD PROGRAM. EARNINGS ARE TO SUPPORT THE TRAVEL OF INDIVIDUALS TO THE ANNUAL MEETING FROM UNDERSERVED REGIONS OF THE WORLD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FINANCIAL STATEMENT EFFECTS OF A TAX POSITION TAKEN OR EXPECTED TO BE TAKEN ARE RECOGNIZED IN THE FINANCIAL STATEMENTS WHEN IT IS MORE LIKELY THAN NOT, BASED ON THE TECHNICAL MERITS, THAT THE POSITION WILL BE SUSTAINED UPON EXAMINATION. AS OF DECEMBER 31, 2023, THE SOCIETY HAD NO UNCERTAIN TAX POSITIONS THAT QUALIFY FOR RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION DELEGATES CONTROL OVER MANAGEMENT DUTIES TO THE KELLEN COMPANY, AN ASSOCIATION MANAGMENT COMPANY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION IS MADE UP OF DOMESTIC AND INTERNATIONAL MEMBERS. THE TYPES OF MEMBERS INCLUDE: REGULAR MEMBER, REGULAR MEMBER-ELECTRONIC, RETIRED MEMBER, RETIRED MEMBER-ELECTRONIC, STUDENT MEMBER, STUDENT MEMBER-ELECTRONIC, AFFILIATE MEMBER, AFFILIATE MEMBER-ELECTRONIC, AFFILIATE MEMBER-RETIRED, AFFILIATE MEMBER RETIRED-ELECTRONIC, AFFILIATE STUDENT MEMBER,AFFILIATE STUDENT MEMBER-ELECTRONIC, EARLY CAREER, EARLY CAREER-ELECTRONIC AND CORRESPONDING MEMBER (NON-VOTING). ONLY THOSE WHO ARE MEMBERS IN GOOD STANDING 7 CALENDAR DAYS PRIOR TO THE CLOSE OF THE ELECTION OF BOARD MEMBERS DESCRIBED IN ARTICLE IX SHALL BE ELIGIBLE TO RECEIVE BALLOTS AND VOTE IN THE ELECTION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MEMBERS WHO HAVE PAID THEIR DUES IN FULL SHALL BE MEMBERS IN GOOD STANDING AND SHALL BE ENTITLED TO NOMINATE AND /OR RUN FOR OFFICE, PRESENT MATTERS FOR CONSIDERATION BY THE BOARD AND GENERAL MEMBERSHIP AT ANYTIME, ONLY THOSE MEMBERS IN GOOD STANDING 7 CALENDAR DAYS PRIOR TO THE CLOSE OF THE ELECTION OF BOARD MEMBERS SHALL BE ELIGIBLE TO RECEIVE BALLOTS AND VOTE IN THE ELECTION, ALL MEMBERS IN GOOD STANDING CAN CAST A VOTE TO CHANGES IN THE BYLAWS OR MEMBERSHIP-DETERMINED POLICY DECISIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MEMBERS IN GOOD STANDING SHALL BE ELIGIBLE TO PRESENT MATTERS FOR CONSIDERATION BY THE BOARD AND GENERAL MEMBERSHIP AT ANY TIME; ALL MEMBERS IN GOOD STANDING CAN CAST A VOTE TO CHANGES IN THE BYLAWS OR MEMBERSHIP-DETERMINED POLICY DECISIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED BY THE SOCIETY'S CONTROLLER AND EXECUTIVE DIRECTOR. IT IS ALSO SENT TO THE SOCIETY'S TREASURER AND THEN TO THE FULL BOARD AFTER THE TREASURER HAS COMPLETED HIS OR HER REVIEW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL ISTSS OFFICERS ARE REQUIRED TO DISCLOSE ANY ACTUAL OR POTENTIAL FINANCIAL OR NON-FINANCIAL INTEREST WHICH HE OR SHE MAY HAVE IN ANY MATTER PENDING BEFORE ISTSS THAT COULD BE CONSTRUED AS RESULTING IN A CONFLICT OF INTEREST. WHEN A CONFLICT OF INTEREST IS DISCLOSED, THE EXECUTIVE COMMITTEE GENERALLY WILL BE ABLE TO EVALUATE AND ADJUST FOR THE POSSIBLE INFLUENCE OF THE DISCLOSED INTEREST. IF IT IS DETERMINED THAT A CONFLICT OF INTEREST EXISTS, THE EXECUTIVE COMMITTEE MAY REQUIRE AN ACTION IT DEEMS APPROPRIATE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI, SECTION B, QUESTION 15 THE ORGANIZATION HAS NO PAID EMPLOYEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BYLAWS ARE AVAILABLE ON THE ORGANIZATION'S WEBSITE. THE GOVERNING DOCUMENTS INCLUDING THE CONFLICT OF INTEREST AND THE FINANCIAL STATEMENTS ARE ALL AVAILABLE UPON REQUEST DURING BUSINESS HOURS AT THE MANAGEMENT COMPANY, 111 W. JACKSON BLVD, #1412, CHICAGO, IL 60604.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
